FFKM alternative – use Perlast
Perfluoroelastomers are well regarded as the ultimate high performance sealing material for the most challenging and critical applications. So when the supply of FFKM seals is limited, it can severely interrupt your production schedules and impact profitability. A reliable alternative, such as Perlast®, complemented by our class leading manufacturing lead-times will minimise supply disruption and downtime.
If you need an FFKM alternative, here are 4 reasons why you should consider Perlast® from PPE ….

Why Perlast® is considered an excellent FFKM option?
Availability expand_more
You may have experienced difficulties in obtaining some perfluoroelastomer (FFKM) grades; this is due to a number of factors which, when combined, have created a global supply chain problem. A global shortage of polymer ingredients, sanctions on Russia, the energy crisis in China, high demand from specialist markets, the impact of Covid, and some manufacturing plants being offline, have all played their part.
Perlast® perfluoroelastomers are not facing the same supply shortages that are affecting other FFKM grades. PPE can manufacture Perlast® O-rings and seals in lead-times of approximately 30 days; if we have stock, components can be shipped the same day.
Extreme temperature capability expand_more
Perlast® materials provide a broad temperature range to offer a comprehensive Cold²Hot FFKM capability from -46°C (-51°F) up to +350°C (662°F). Whatever the application or sealing challenge, there will be a Perlast® material to suit, with consistent performance.
Excellent chemical resistance expand_more
Perlast® perfluoroelastomers are proven to provide almost universal chemical resistance, even in some of the most inhospitable environments. You won’t sacrifice any chemical resistance if you choose Perlast® over other FFKMs – in certain applications Perlast® outperforms competitor grades, especially in amines and steam.
Technical support expand_more

Our teams of engineers and material scientists have been helping some of the most successful companies in the world with their sealing challenges for many years. If you need to requalify alte ative FFKM materials, speak to our team about samples and testing. We are happy to provide seal and hardware design advice, material recommendations and technical assistance, with the aim of becoming your preferred sealing partner.
Benchmark testing of FFKM materials
A comparison of Perlast® materials grades against other FFKM competitor grades.
Technical resources
You can find all of our datasheets in one place.
Comparison of FFKM grades
Perlast® | Kalrez® | Chemraz® | Isolast® | Parafluor® | Simriz® |
G74P | 629 639 | SZ489 | |||
G74S | 6221, 6380 6230 LS390, LS205 | SD517 SD585 SD625 | J9515 J9516 | V8921-75 V8951-70 V8911-75 | SZ484 SZ486 |
G75B | 4079 7075 | 551, 555, 615 618, 653 | HT8325 | V8930-75 | SZ487 Z7257 |
G75LT | 0040 | 564LT | F400-80 | ||
G80A | 6375 | 505, 528, 550 565, 605 | J9503 J9512 | V8920-75 V8787-75 | SZ481 SZ485 SZ495 |
G90LT | 0090 | 566LT 678 | |||
G92E | 7090 3018 | 526, 562 600 | J9509 J9513 |
Registered trademarks:
Perlast® – Precision Polymer Engineering, Kalrez® – Dupont Performance Elastomers, Chemraz® – Greene Tweed, Isolast® – Trelleborg Sealing Solutions, Parafluor® – Parker Hannifin, Simriz® – Freudenberg
Certification and compliances
Perlast® perfluoroelastomer grades have been developed to provide optimum performance in a variety of applications. Selected Perlast® materials have been developed to be compliant with the industry standards below:-
Food & Dairy | Medical | Oil & Gas |
• FDA 21 CFR § 177.2600 (A-F) • FDA 21 CFR § 177.2400 (D) • BfR XXI/1 Category 4 • EC1935/2004 compliant • EC2023/2006 compliant • 3-A Standard 18-03 Class I • BAM (reactivity with oxygen) | • USP Class VI <87> • USP Class VI <88> • USP <381> Type I | • NORSOK M710 Annex A • NORSOK M710 Annex B • TOTAL GS PVV142 • NACE TM0297 • ISO 10423 (API 6A) |
Please contact us to discuss your FFKM sealing requirements, or refer to material datasheets for further details.